Broadcom Limited ASSR-1411-301E

Overview

The ASSR-1411-301E from Broadcom is a single-channel, normally-off, Form A solid-state relay (photo MOSFET) with optically isolated AlGaAs LED input and dual high-voltage MOSFET output stage. It delivers 60 V output withstand voltage, 0.6 A/1.2 A dual-mode DC current rating (Connection A/B), and 0.2 Ω typical on-resistance for DC-only operation - enabling reliable AC/DC or DC-only signal and low-power load switching in industrial controls and telecom interfaces.

For engineers reviewing the ASSR-1411-301E datasheet, pinout, applications, or equivalent options, key selection criteria include its gull-wing 6-pin DIP surface-mount package, UL 3750 Vrms isolation, sub-0.3 ms turn-on time, and dual-output connection flexibility (A/B) affecting R(ON) and IO ratings.

Technical Context

The ASSR-1411-301E uses an AlGaAs infrared LED optically coupled to a photovoltaic diode array that drives two discrete high-voltage MOSFETs - forming a bidirectional, single-pole-single-throw (SPST) switch. Its turn-on threshold is defined at ≥3 mA input current, and turn-off occurs at ≤0.8 V forward voltage across the LED.

It supports two distinct output configurations: Connection A enables AC/DC operation (0.6 A, 0.7 Ω typical R(ON)), while Connection B enables DC-only operation (1.2 A, 0.2 Ω typical R(ON)). Both operate over –40°C to +85°C and meet UL1577 (3750 Vrms) and CSA Component Acceptance #5 safety requirements.

Key Specifications

Pinout & Package

The ASSR-1411-301E uses a 6-pin DIP gull-wing surface-mount package (300-mil width), RoHS-compliant and lead-free, with pin 1 marked by dot orientation. Package dimensions: 9.65 ± 0.25 mm length × 6.35 ± 0.25 mm width × 3.56 ± 0.13 mm height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar solid-state relay applications.

Compared with the ASSR-1411-301E, the TLP3558A offers higher isolation but no dual-connection flexibility, while the VO3120 adds zero-crossing control at the expense of DC performance tuning - making the ASSR-1411-301E uniquely suited for designs requiring selectable AC/DC or high-efficiency DC-only operation in compact DIP-6 gull-wing layout.

Availability

The ASSR-1411-301E is available at Aetrix Electronics and suitable for industrial controls, telecom infrastructure, medical diagnostics, and security system designs requiring stable component supply, long-lifecycle support, and RoHS-compliant surface-mount relays.

Supply support for ASSR-1411-301E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Broadcom Inc. is a global semiconductor leader designing high-performance connectivity, infrastructure, and optoelectronic solutions for enterprise, industrial, and communications markets.

The ASSR-1411-301E belongs to Broadcom's general-purpose photo MOSFET relay family, engineered to replace electromechanical relays in signal and low-power load switching applications demanding reliability, speed, and regulatory-compliant isolation.

FAQ

What is the recommended input drive current for reliable operation of the ASSR-1411-301E?

The ASSR-1411-301E has a minimum turn-on threshold of 3 mA, but Broadcom specifies 5–10 mA as the recommended operating range for guaranteed performance across –40°C to +85°C. Driving the ASSR-1411-301E at 5 mA ensures stable activation under worst-case temperature and aging conditions while maintaining CMOS compatibility and low power consumption.

How does the ASSR-1411-301E support both AC and DC loads?

The ASSR-1411-301E supports AC/DC loads through Connection A wiring (pins 4–5 as drains, pin 6 as common source), rated for 0.6 A and 60 V peak. For DC-only use, Connection B (pins 4 and 6 as drains, pin 5 as common source) enables 1.2 A current and lower 0.2 Ω R(ON). The internal dual-MOSFET architecture and symmetric output structure allow this bidirectional capability without external components.

What safety certifications apply to the ASSR-1411-301E?

The ASSR-1411-301E is UL recognized per UL1577 (3750 Vrms for 1 minute) and approved under CSA Component Acceptance Notice #5. It achieves IIIa insulation group per DIN VDE 0109 and has 7.1 mm minimum creepage and 7.4 mm minimum clearance - satisfying reinforced insulation requirements for industrial and medical equipment per IEC 61010 and IEC 60601-1.

Can the ASSR-1411-301E replace electromechanical relays directly?

Yes - the ASSR-1411-301E is functionally equivalent to a 1 Form A (SPST-NO) electromechanical relay, with identical logical behavior (open when off, closed when on), 60 V blocking voltage, and 0.6 A/1.2 A load current capability. Its gull-wing DIP-6 footprint matches legacy EMR footprints, and its 0.25 ms switching eliminates contact bounce, enabling drop-in replacement in most signal and low-power control applications.

What is the thermal derating behavior of the ASSR-1411-301E at elevated ambient temperatures?

The ASSR-1411-301E's maximum output current decreases linearly above 25°C: at 60°C ambient, Connection A supports ~0.45 A and Connection B supports ~0.9 A (per Figure 2 and Figure 3). Derating is governed by junction temperature limits (125°C max); sustained operation above 85°C ambient is not supported, and PCB copper area must follow Broadcom's 4-layer board recommendations to maintain safe thermal margins.